package com.servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.constants.StringCons;
import com.utils.DBUtility;

/**
 * @author Administrator
 *
 */
public class CheckIDServlet extends HttpServlet {
	private Connection conn;
	private PreparedStatement pst;
	private ResultSet rs;
	
	private static final long serialVersionUID = 4743752413954076399L;

	/**
	 * Constructor of the object.
	 */
	public CheckIDServlet() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * The doGet method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

	this.doPost(request, response);
	}

	/**
	 * The doPost method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to post.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		String id = request.getParameter( "id" );
		
		String info = this.checkAccount( id );
		
		PrintWriter out = response.getWriter();
		
		
		out.print( info );
		out.flush();
		out.close();
	}

	
	private String checkAccount( String id ){
		String result = "no";
		
		conn = DBUtility.getMySqlConnection();
		
		try {
			String sql = "select jiankong_object from jiankong_realations_table where user_account=?";
			pst = conn.prepareStatement( sql );
			
			pst.setString( 1, id );
			
			rs = pst.executeQuery();
			
			while( rs.next() ){
				result = rs.getString( "jiankong_object" );
				
			}
		} catch (SQLException e) {
			e.printStackTrace();
		}finally{
			
			closeAllConnections();
			
		}
		
		
		
		return result;
		
	}

	/**
	 */
	private void closeAllConnections(){
		
		if( rs != null ){
			
			try {
				rs.close();
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
			
		}
		
		if( pst != null){
			
			try {
				pst.close();
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
			
		}
		
		
	}
	
	
	public void init() throws ServletException {
		// Put your code here
	}

}
